This is not supported.
the css for the featured and most popular pods was designed to only show one item, you can change the recordset to return more than one item easily enough, but you will need to also modify the css. we cannot help you with the css edits.
the featured recordset code is:
$query_FeaturedRS = "select * from ps3_products where ProductLive = 1 order by abs(ProductID - (select wa_settings.value AS SettingValue from wa_settings where wa_settings.name = 'Featured Product')) limit 1";
the "limit 1" function at the end is causing it to return only one row. change the limit to return the number of rows you would wish instead.
similar for the most popular pod, change the limit on the recordset.